1、 There are several varieties

There are many varieties of elms. There are about 40 kinds of elms in the world, and there are 25 kinds and 6 varieties of elms in China. Common varieties include Ulmus pumila, Ulmus pumila, Ulmus pumila, Ulmus pumila, Ulmus pumila, Ulmus pumila, Ulmus pumila, Ulmus pumila, Ulmus pumila, Ulmus pumila and other varieties. It is planted all over the country, mostly in the north of the Yangtze River Basin, such as Hebei, Shandong, Henan, Shanxi, Inner Mongolia, Shaanxi, Gansu and Ningxia. In addition, elm has high ornamental value, economic value and medicinal value. It is also one of the main tree species for building windbreak forest, soil and water conservation forest and afforestation in saline alkali land in China.

2、 Which is more precious

Most elms have strong adaptability and low requirements for growth environment. Moreover, with fast growth speed, long service life and low planting conditions, it is easier to feed, so there are few extremely precious varieties. However, some varieties of elm have a great impact on people's life.

From the perspective of practical value and economic value, the more precious elm varieties mainly include drunken Weng elm, big fruit elm, Hangzhou elm, split leaf elm, Xingshan elm, white elm, dragon claw elm, dry elm and so on. Most of them can be used for appliances, furniture and other materials, or can be used as afforestation and urban landscape tree species in northwest desert, North China and Huaibei plain, hilly and northeast barren mountains, sandy land and coastal saline alkali land, which has high ornamental value.